package com.gupao.gupaoeduvippattern.javaBase.a3Genericity.demo1;

/**
 * @author Administrator
 * @date 2020-12-22 20:58
 */
public interface Cal {

    /**
     * 没有引入泛型，这样设计的代码比较单调，low
     * @param a
     * @param b
     * @return
     */
    int cal(int a, int b);

    int sub(int a, int b);

    int mul(int a, int b);

    int div(int a, int b);


}
